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31) SPI wishbone master and verification environment complete source code, has been tested.

32) The key points lies in interface resolve method in hybrid voltage-logic design, A/D sampling circuit, SPI communication port and the protect of the main circuit.

33) Taking W77E58 and MAX3100 as example, the paper introduces a method of using I/O interface of singlechip to simulate Serial Peripheral Interface (SPI) at first.

34) SPI now is one of the very fashioned series synchronous interface.

35) And finally reveal the test card multifunction command instruction and simple, high efficiency SPI ptotocol which can be for the good reference of the same testing card design.